Smart Door and Window Sensor Sonoff SNZB-04PR1 – Zigbee 3.0 Protocol, CR2477 Battery Powered, Real-Time Opening Alerts, eWeLink & Home Assistant Compatible

Description

Sonoff SNZB-04PR1 is the ideal solution for securing your home and creating smart automations based on the state of doors, windows, gates or drawers. The new version in the Pro (PR1) series brings a substantial improvement in battery life and mechanical reliability, being designed to withstand intensive daily use without frequent battery changes.

Thanks to Zigbee 3.0 technology, the sensor instantly transmits state changes to the local hub, triggering automations without depending on the speed of the internet connection. The compact size and flame-retardant plastic casing allow discreet, clean installation on any type of frame (PVC, wood, aluminium or metal).

Note: This product uses the Zigbee protocol and requires a compatible Zigbee hub/bridge (e.g. Sonoff ZBBridge-P / Sonoff ZBBridge-U / Sonoff ZBDongle-E / Sonoff Dongle-M) to be connected to the network and controlled from the app. It does not work on its own over WiFi.

Key Features & Technical Advantages

• Extended CR2477 Battery Life: The use of a high-capacity battery (CR2477) combined with the low consumption of the Zigbee 3.0 chip provides long battery life, removing the worry of constant maintenance.

• Fast Open / Closed Detection: The internal magnetic sensor sends instant notifications to your phone the second the door or window is opened or closed.

• Detailed Event History: Automatically logs every opening and closing with the exact time and date in the eWeLink app, giving you a clear record of access to your home.

• Low Battery Notification: You get an automatic alert in the app when the battery level drops below the safety threshold, so you can replace it in good time.

• Simple Tool-Free Mounting: Fixes quickly with the included 3M double-sided adhesive tape, and can be placed on main doors, windows, garage doors, safes or medicine/document cabinets.

• Universal Zigbee 3.0 Compatibility: Integrates directly with Sonoff hubs (NSPanel Pro, ZB Bridge-P/U, iHost), as well as with open-source and third-party platforms: Home Assistant (via ZHA or Zigbee2MQTT), SmartThings, Hubitat and Amazon Alexa.

Ways to Use It and Scenarios

1. Anti-Burglary Alarm System: Set up a critical notification to your phone and trigger the siren/hub (e.g. Sonoff NSPanel Pro) if a window or the front door opens while you are away from home.

2. Saving Energy on Climate Control: Schedule the thermostat or the air conditioning to switch off automatically when the sensor detects that the window in the room has been left open for more than 2 minutes.

3. Automatic Lighting When Entering the Home: Set the hallway light to switch on instantly (via a Sonoff smart relay) as soon as the front door opens in the evening.

Technical Specifications

• Brand / Model: SONOFF SNZB-04PR1

• Sensor Type: Magnetic contact sensor (Door / Window)

• Wireless Protocol: Zigbee 3.0 (IEEE 802.15.4)

• Switching Distance (Gap): < 15 mm

• Power Supply: 1 × CR2477 battery (3V)

• Operating Temperature: -10°C ... +40°C

• Operating Humidity: 5% - 95% RH (non-condensing)

• Casing Material: Flame-retardant PC (White colour)

• Mounting: 3M double-sided adhesive tape (included)

• Control App: eWeLink (iOS / Android)

• Ecosystem Compatibility: Sonoff iHost, NSPanel Pro, ZB Bridge-P/U, Home Assistant (ZHA / Zigbee2MQTT), SmartThings, Amazon Alexa.

Package Contents

• 1 × Sonoff SNZB-04PR1 door/window sensor (main unit + magnet)

• 1 × CR2477 battery (included / pre-installed)

• 1 × Set of 3M double-sided adhesive strips for mounting

• 1 × User manual and eWeLink / Zigbee setup guide

(Note: A compatible Zigbee 3.0 Hub/Gateway is required for connection, remote access and running scenes).

Practical use cases

• Mounted on the front door, it sends an instant notification to your phone if the door is opened while you are away from home.
• Used on the bedroom window to automatically switch off the air conditioning or the boiler when the window is open, saving energy.
• Integrated into an automation that automatically switches on the hallway light when the front door is opened in the evening.

Technical specifications:

The SNZB-04PR1 is the ideal choice for anyone who wants to know at any time whether a door or window has been left open, and to reduce wasted energy.